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Concentration of Utah fluorite ores

Concentration of Richmond Hill oxide manganese ore from Lead, Lawrence County, S. Dak.

Concentration of Lake Valley mines oxide manganese ores from Deming, N. Mex.

Concentration of miscellaneous oxide manganese ores from Yavapai, Yuma, Maricopa, and Mohave counties, Ariz.

Concentration of oxide manganese ores from Columbia and Elberta mining districts, Tooele and Juab counties, Utah :(Wildcat, Sharp, and Aeronaut no. 1 properties)


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